Our first basset hound was very young when our other dog ( a cocker spaniel) died.
He was inconsolable whenever we left him alone and we ended up putting him in doggy daycare so he had company.
We got him a companion (another basset puppy) and they were perfectly happy home together.
Now as old dogs they're fine so long as they're together; even vet visits are a drama unless they both go.
Hope that's useful.